(19)
(11) EP 0 056 012 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.08.1982 Bulletin 1982/31

(43) Date of publication A2:
14.07.1982 Bulletin 1982/28

(21) Application number: 82300037

(22) Date of filing: 05.01.1982
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI NL SE

(30) Priority: 05.01.1981 US 222338

(71) Applicants:
  • Porter, George D., Jr.
     ()
  • Rhodes, Charles D.
     ()

(72) Inventor:
  • Porter, George D., Jr.
     ()

   


(54) Herbicide applicator system


(57) A metering tube (50) injects liquid herbicide into the central flow passage (48) of a fluid permeable rope (14). The liquid herbicide flows along the length of the rope and is emitted from the inside of the rope to its outside surface. The metering tube (50) is supplied from an accumulator tank (62) in which a volume of the liquid herbicide is pressured by compressed air. The liquid herbicide (64) in the accumulator tank (62) is maintained at a selected pressure by a charge of compressed air delivered from a storage tank (20) through a pressure regulator valve (80) to the accumulator tank. The metering tube (50) is lodged within the central flow passage (48) of the rope applicator (14) and a ferrule fastener (54) compressively engages the rope section surrounding the metering tube (50), thereby defining an annular seal which allows the flow of liquid herbicide through the metering tube (50) while preventing the flow of liquid herbicide by wicking action through the end of the rope. This arrangement provides close control of the flow rate of liquid herbicide into the rope applicator (14), and is not dependent upon the variables associated with wicking flow.







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